I read somewhere that if a bricklayer came home and told his wife he'd have to go to bed for six months because he had 'bricklayer's block' said wife would hit him with a brick and then throw him out. I believe it was James N Frey.
If we have writer's block we're writing about the wrong thing--or we need to paint (or some such) for a while.
If you CAN'T do something you probably need to do something else for a while.
There's a story in that.